NullPointerException in Notifications

I am getting a null pointer exception when I try to test notifications (I have twilio-SMS and smtp-mail enabled) and get no notifications from events even though events are registered in the database.

After debugging the code, I realized that CacheManager has no users or devices (CacheManager.deviceCache size is zero) and hence a null is being returned in org.traccar.notification.NotificationFormatter on both of these lines:

        User user = cacheManager.getObject(User.class, userId);
        Device device = cacheManager.getObject(Device.class, event.getDeviceId());

I temporarily modified the code as follows to test my SMTP and SMS configuration as follows:

        User user = Context.getPermissionsManager().getUser(userId);
        Device device = event.getDeviceId() == 0 ? null : cacheManager.getObject(Device.class, event.getDeviceId());

And was able to get test notifications via SMS and mail.

Any idea what could be wrong preventing the CacheManager from being populated?

Thanks in advance

What version?

Master from a few days ago.

How many days is "a few"? Before or after this fix?

https://github.com/traccar/traccar/commit/7ccffa266e87badbbcfde73db86216fd4c667f35

As usual, spot on... A few days was prior to the fix. All is good. Thanks